Square hole drill bit adapter is fit compatible with benchtop drill presses and hand drill clamp diameter ranging between 38 to 55mm/1.5 to 2.2inch, allowing compatible with efcompatible withtless installation and use. Your ultimate solution compatible with enhancing the versatility of your table drill and hand drill. Square Hole Drill Bit Adapter is compatible with table drill and hand drill. Square Hole Drill Bit Adapter is perfect compatible with woodworking, furniture making, and other related industries. Mortise converter is easy to install and remove, you can quickly install or remove yourself, saving you time and efcompatible witht. Square hole drill fixed bracket is sturdy. If youre looking compatible with a versatile and efficient way to quickly install or disassemble drill accessories, then look no further than the Square Hole Drill Bit Adapter With its precise design, the adapter ensures accurate and drilling operations. Note: Square hole drill and electric drill are not included in the package. If stored in a humid environment compatible with a long time, it may lead to some surface rusting, which can be improved by simply wiping some protective oil. Material: Stainless steel colour: silver Package Contents: 1 x Square Hole Drill Bit Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.